Sizing plug



March 26, 1929.

J. E. BA INES ET AL SIZING PLUG Q .LHNI m M m w\ 23% M wa L 0 IX 1 22 2% a a March 1929- J. E. BAINES ET AL SIZING PLUG Filed 0ct.l8, 192s 4-Sheets-Sheet 2 fitnesses March 26, 1929. J BNNES ET AL 1,706,513

SIZING PLUG Filed 0ct. 18, 192.6 4 Sheets-Sheet 4 I/Zkeesses: lnvezzt'ors:

JOSEPH E. 54/NE5 40d M 4605 F 50545.

Patented Mar. 26, 1929. I

UNITED sTATEsrArsnr errics.

JOSEPH E. .BAI-NES AND JACOB P. Bosnia, or rrrrsnunen, rE vNsYL ANIA, ASSIGNORS To NATIONAL TUBE COMPANY, 11 CORPORATION on NEW JERSEY,

srzin'e PLUG.

Application filed October 18 1926. Serial No. 142,343.

This invention relates to sizing plugs, and

While not limited thereto, relates particularly to sizing plugs for gaging threaded pipe couplings and: other internally threaded articles, and has for oneof its objects the provision of aquick acting plug which may be collapsed for movement into and out of the article being gaged' without the neces sity of threading the articlethereon.

Another object is to provide gaging and indicating means on the plug for indicating the amount the article is oversize or undersize in terms of threads or turns necessary to fit the article to the gage or plug.

A further object is to provide asizing plug of the class described with means for Jindicating Whether ornot the end face of the article being gaged is square or true.

That is, whether said: face extends'at 90 degrees :to thelongitudinal center line of the article. I

In the drawings:

-Figure 1 is a side elevation," partly in,

section, of a sizing plug. embodying this invention. t

Figure 2 is a rear end view, with the cover plate removed.

Figure .3 is section;

Figure 4 is asectional-view takenv on the a front end view, partly in line IV-IV ofFigure 2; p

Figure 5is a fragmentary elevation showing the indicators.

. Referring more particularly tothedraw ings, the numeral 2 designates the holder as awhole which is composed of a head-portion 8 and peripheral: flange portion 4-. The head portion-'3 is providedwith a centrally arranged aperture 5 in which a cam member A is secured. 1 I

The cam-member A comprises a body por tion- 6-, and a reduced stem portion 7 adapted to project into the aperture 5 and to be secured therein by a key 8; The body portion 6:is cut away at spaced intervals around its periphery to form cam faces9. v.Th'e forward end of the body portion 6 of the cam member is reduced to form abearing-projection 10' on whicl'i a' cap plate 1 2 is mounted. i V

- A hollow cylindrical segment carrier 14 is mounted around the cam member, and is provided with-.aplurality of longitudinal slots 1 in whichthe-se ments'l6-are meanted. in, and. die carrier 14 .vi ded with a bearing flange17 which projects inwardly around the stem 7 and against the shoulder 18. I

The cap plate 12 is secured to the forward end of the carrier 14 by bolts 19 so as to supp'orttheforward end of the carrier.

The forward end of the carrier 14: is provided with a slot or gro0ve'20 to receive a segmentretracting spring 21. 2'

i The segments 16 are drilled to provide holes .22'through which the spring wire 21 is passed. The wire 21 is passed through the'holes 22 in the segments 16 and around the groove or slot 20 and is-held under tension between each of the'segments by pins 24.

The carrier 14 is adapted to be rotated relative to the cam member in order to move the segments across the cam faces'9. Therefore, the holder 2 is slotted as at 25-and a handle 26 projects through the slot'and is threaded into the carrier as at 27.

In operation the handle 26 will be moved counterclockwise, as viewed in Figure 3, to

move the carrier 14 and segments 16 in the same direction, so that the segments will be positioned over the low parts ofthe cam faces -9, and the springs2l will retract the 'segments into collapsedv position.

With the segments 16 collapsed or retracted, a coupling or other article'to be threaded is slipped readily over the segments, and the handle 26 is moved in a clockwise direction, as viewed in Figure 3, to

move the segment carrier 14' and segments 16, sothat the segments 16 areforced onto the high parts of the cam faces'9 and there- 7 threads of the articl'eto be gaged.

extended or expanded to engaged the After the segments are expanded the articlelis rotated: a few turns to screw it home.

From the above it will be readily appreciated that the time necessaryjto gage an internally threaded coupling is greatly re- 7 I the one-piece or rigid plugs heretofore use 'duced from that necessarily consumed by V threading the article over The head?) andfiange 4' of the holder are apertured at spaced-points to form sockets reciprocation in said of slightly greater length; tlilttlthe plungers .28, 29 and 30,"for the reception of gage plungers 31, 32 and 33 respectively, which 32 and 38. The socket 28 is slotted at 35 and an indicator-hand 36 is mounted in the plunger and projects through the slot 35 to cooperate with the indicia 37 to indicate the movement of the plunger 31. The plunger 31 is provided with an adjustable contact screw 38 adapted to be adjusted in or out to engage various lengths of articles being gaged.

The plungers 82 and 33 are each shorter than the plunger 81 and are provided with adjustable contact screws 39. The plungers 82 and 83 are pivotally connected at their upper ends to one end of rocking levers 10 and 4-1, respectively, which extend transversely ofthe head 8 in slots 42 and 18.

The levers and -11 are iulcrumed at their centers at 14C and 45, respectively, and have 7 their other ends pivotally connected to pins 46 and 47, respectively, carried by spring pressed plungers 4L8 and 49, respectively. Other rocking levers 50 and 51, which are of equal length with the levers 40 and 11,

have one end pivotally connected to the pins 46 and r7, respectively, and are fulcrumed at their centers as at 52 and 53, respectively, in the slots 42 and i3, and have their other ends pivotally connected to the upper ends of indicator plungers or rods 5 1- and '55, respectively. The rods 5.4: and .55 are mounted in sockets 56 and 57 respectively, formed close to and. parallel with and on the opposite sides otthe socket 28. -The' rods 54 and 55 are provided with indicator hands 58 and 59, respectively, which extend through slots 56 and 57 in the walls of the sockets 56- and 57 and cooperate with the indicia 87 to indicate the movement of the plungers 82 and 38-. The levers 10, 41 and 50 and 51 being ofequal length and each being iulcrumed at their centers, the movement of the plungers 32 and 33. will be reproduced exactly by. the indicator plunge-rs or rods 5% and 55.

In operation, the contact screws 88 and 89 are adjusted so that they will be engaged by the end of the article to be gaged' when the article is. slipped over the segments 16. That is, the articleto be engaged is adapted to be positioned on the plug so that two or three turns are all that are 'necessary to screw. it home, and the contact screws 88 and 89 should be 'ad'justed'to the proper position so that the article being gaged will engage and move the plunger 31 rearwardly until its indicator-hand 36 is in line with the hands 58 and 59- of the indicator rods when the article contacts with the contact screws of all three plungers.

WVhen the article engages all the contact screws 38 and 39, the segments 16 should be expanded and the article screwed home. When the article is screwed home on the segments, the hands 35, 58 and 59 should point to zero. If the article is under or oversize, theposition of the indicator-hands will indicate the amount of size in terms 32 and 33 will move in and out and this movement will be shown by the indicatorhands 35, 5,8 and 59 and notify the operator so that the article may be rejected.

l/Vhile .we have shown and described one specific embodiment of our invention, it will be understood that we do not wish tobe' limited thereto, since various modifications may be made without departing from the scope OT".O11F invention as defined inthe appended claims. Y We claim:

,1. A sizing gage for gaging threadedpipe couplings and other internally-threaded ar ticles comprising aplug body, a plurality of segment members mounted in said body and movablediametrically thereof, said segment membersbeing adapted to be retracted into said body topermit thearticle being gaged to be moved onto or taken off said plug and tobe extended to engage the'article, means for retracting and extending said segments, gaging plungers mounted in said plug and adapted to engage the end face of the article being gaged, and indicating means operable by said plungers.

2. A sizing gage for gaging threaded pipe couplings and other internally threaded articles comprising a plug body, a plurality of segment members mounted in said body and movable diametrically thereof, said segment members being adapted to be retracted into said body to permit the article beinggag'ed to be moved onto or taken oflt' said plug and to be extended to engage the article,means for: retracting and extending said'segments, the article to be gaged being adapted to be mounted on the extended segments, a gag ing plunger mounted in said plug and extending into the path of the articles mounted on said segments, said plunger being adapted to be engaged by the end ofthe article being gaged and to be forced'into said plug as the article is screwed home, and'an indicator adapted to be operated by said plunger to indicate the amount the article being gaged is over or under size interms otturns'or threads necessaryto fit the article to the plu ,3. A sizing gage for gaging threaded pipe couplings and other internally threaded articles comprising a plug body, a plurality w of segment members mounted in said body and movable diametrically thereof, said seg ment members being adapted to be retracted into said body to permit the article being gaged to be moved onto or taken off said plug and to be extended to engage the article,vmeans for retracting and extending said segments, the article to be gaged being adapted to be mountedv on the extended segments, a gaging plunger mounted in said plug and extending into the path of the ar-- plunger to indicate the amount the article;

being gaged is over or'under size in terms of turns or threadsjnecessary to fit the 'article to the plug, other plungers at spaced intervals around said plug also adapted to engage the end face of the article being gaged, and indicators adapted to be operated holder, means for by said last named plungers, and all of saidplungers being adapted toprovide a uniform movement of said indicators if the end face of the article being gaged is square or true and to indicate by-non-uniform movement when the end face of the article is not square or true. 7 V i 4:. A sizing gage plug for gaging threaded pipe couplings and other internally threaded articles comprising a holder, a cam member fixedly mounted within said holder, a segment carrying sleeve mounted around said cam member, said segment carrying sleevebeing adapted to rotate relative to said cam member, a plurality of cam faces on said cam member, a plurality of thread segments mounted in slots in said segment carrying sleeve and adapted to engage said cam faces, spring means for normally holding said segments against said cam faces, and means for rotating said segment carrying sleeve relative to said cam to move said segments over said cam faces to extend and retract said segments. v

5. A sizinggage plug for gaging threaded pipe couplings and other internally threaded articles comprising, in combination, a cylindrical holder, a segment carrying member within-said holder, segments mounted in said the end of lindrical holder,

after said segments are retracting and extending said segments to permit the article being gaged to be mounted'on or' taken off said plug and to gage said article respectively, said plug being adapted to have the article being gaged screwed home thereon after said segments. are extended, a gaging plunger mounted in said holder and extending into the path of the articles mounted on said seg ments, said plunger being adapted to be engaged by the end of the article being gaged and to be moved rearwardly as the article is screwed home, and an indicator adapted tobe operated by said plunger to indicate the amount the article being gaged is over or under size in terms of turns or threads necessary to fit the article to the plug.

6. A sizing gage plug for gaging, threaded pipe couplings and other internally threaded articles comprising, in combination, a cya segment carrying member within saidhol'der, segments mounted in said holder, means for retracting and ex-,

tending said segments to permit the article being gaged to be'mounted on or taken off said plug and to gage said article respectively,'said plug being adapted to have the article being gaged screwed home thereon extended, a gaging plunger mounted in said ing' into the path of the said segments, said plunger being adapted to be engaged by the end of the article being gaged and tobe moved rearwardly as the article is screwed home, and an indicator adapted to be operated by said plunger to indicate the amount the article being gaged is overor under size in terms of turns or threads. necessary to fit thearticle to the plug, other plungers at spaced intervals around said holder also adapted to engage the end face of the article being gaged, and

indicators adapted to be operated by said the article being gaged is square or true and 100 to indicate by non-uniform movement when holder and extendarticles mounted on the end face of the article is not square or true.

In testimony whereof, We have hereunto I signed our names.

JOSEPHv E. BAINES. JACOB P. BOSLE. r 

